How is it in poor taste?

It's literally just a coincidence. It didn't even occur to me until other people said it.

Adding to the other reply,

https://www.cbc.ca/news/trending/deadraccoonto-honoured-by-toronto-with-sidewalk-vigil-1.3146036

Is more probably what there referencing.

Doesn't make it better, but for sure a different cultural context

Before this, the only place I have ever heard that slur is from a Pink Floyd song, but until now I could only guess to whom it referred.

They probably used that graphic because Toronto has an actual raccoon problem. I'm not commenting on the "tastefulness" of the graphic

https://toronto.citynews.ca/2023/11/03/toronto-raccoons-war-big-story-podcast/

https://www.blogto.com/city/2022/11/toronto-raccoon-corpse-problem-canine-distemper/

It's not trying to reference the slur.
Raccoons are to Toronto as Rats are to New York.

Yes, the slur "Coon" definitely exists up there. Very likely imported from american media/influence.

It holds the same place in Canadian vernacular as a hateful slur in many places. Though you will also get a lot of unknowing folks who just call raccoons "Coons" still.

We just call Doug Ford (the Premier of Ontario) directly on his personal cell phone and he shows up with his tiny shovel.